If you want to avoid cutting holes in your book jacket, Caitlyn at Instructables recommends another tweak — you can velcro the back flap to the book’s pages. That way, the bracket sits between the internal pages of the book and the back cover. The book is velcroed together so that the back flap doesn’t hang down, and so that the bracket is concealed.

This DIY video shows you how it’s done:

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And voila! Now your brackets are concealed, and you can start stacking your books.